Shimano un55 italian threaded bottom bracket 115mm
With super smooth bearings and a hard wearing sealed cartridge design this shimano un55 italian threaded bottom bracket is a good quality square taped bottom bracket for traditional chainsets the lightweight spindle with the cartridge bearings are both part of the maintenance free sealed unit that keeps out dirt mud and water it keep this bottom brackets life high the thread is italian so will only fit on frames with italian threaded bottom bracket shells